Multi child stroller

ABSTRACT

A child stroller includes a stroller frame and a first seat. The stroller frame has two sections capable of being folded and unfolded relative to each other. The first seat is disposed on one of the two sections in a detachable manner. The first seat includes a supporting unit and a first seat frame. The first seat frame is adapted to hold the supporting unit. The first seat frame includes a seat hub, an upper seat tube and a lower seat tube. The seat hub is disposed on the stroller frame. The upper seat tube is disposed on the seat hub, and the supporting unit is slidably disposed on the upper seat tube. The lower seat tube is disposed on the seat hub and detachably connected to the supporting unit.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of U.S. provisional application No.62/844,333 filed on May 7, 2019 and No. 62/884,375 filed on Aug. 8,2019, which are all incorporated herein by reference.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a child stroller, and moreparticularly, to a child stroller with a functional bench seat and asmall size in the folding mode.

2. Description of the Prior Art

A conventional double child stroller includes a plurality of structuralcomponents assembled in a complicated manner, and requires removal ofsome structural components before folding the double child stroller intoa compact mode. The conventional double child stroller typically has alarge folded size and has a drawback of inconvenient storage. Anotherconventional double child stroller that can be folded more compactly hasdrawbacks of a minimal seat for the occupant and smaller basket storage,and does not offer a raised seat for a younger child to be near theparent.

SUMMARY OF THE INVENTION

The present invention provides a child stroller with a functional benchseat and a small size in the folding mode for solving above drawbacks.

According to the claimed invention, a child stroller includes a strollerframe and a first seat. The stroller frame has two sections capable ofbeing folded and unfolded relative to each other. The first seat isdisposed on one of the two sections in a detachable manner. The firstseat includes a supporting unit and a first seat frame. The first seatframe is adapted to hold the supporting unit. The first seat frameincludes a seat hub, an upper seat tube and a lower seat tube. The seathub is disposed on the stroller frame. The upper seat tube is disposedon the seat hub, and the supporting unit is slidably disposed on theupper seat tube. The lower seat tube is disposed on the seat hub anddetachably connected to the supporting unit.

According to the claimed invention, the upper seat tube is rotatedrelative to the stroller frame via the seat hub. The lower seat tube ismovably connected to the seat hub and adapted to slide the supportingunit relative to the upper seat tube when the stroller frame is folded.

According to the claimed invention, the upper seat tube and the lowerseat tube are rotated relative to the stroller frame via the seat hub.

According to the claimed invention, the supporting unit is a first seatunit. The first seat unit includes a first seat back and a first seatbody detachably disposed on the first seat frame.

According to the claimed invention, the first seat back is slidablyconnected to an upper end of the upper seat tube, and the first seatbody is slidably connected to a lower end of the upper seat tube.

According to the claimed invention, the first seat back is engaged withthe upper seat tube, and the first seat body is engaged with the lowerseat tube.

According to the claimed invention, the first seat unit further includesa textile product installed on the first seat back and the first seatbody, and adapted to move the first seat back or the first seat bodyrelative to the upper seat tube when the stroller frame is folded orunfolded.

According to the claimed invention, the first seat back includes anupper sliding slot portion and a lower sliding slot portion. The uppersliding slot portion is assembled with the upper end of the upper seattube, and the lower sliding slot portion is assembled with the lowerseat tube.

According to the claimed invention, the first seat back further includesa resilient locking portion disposed on the lower sliding slot portionand adapted to block the lower seat tube, for preventing the first seatunit and the first seat frame from separation.

According to the claimed invention, the first seat back is removed fromthe first seat frame when the upper sliding slot portion is separatedfrom the upper seat tube and the resilient locking portion is unlockedto separate the lower sliding slot portion from the lower seat tube.

According to the claimed invention, the first seat body includes a frontsliding slot portion assembled with the lower end of the upper seattube.

According to the claimed invention, the front sliding slot portion isseparated from the upper seat tube to remove the first seat body fromthe first seat frame.

According to the claimed invention, when the stroller frame is folded,the lower seat tube abuts against and moves relative to a second seat ofthe child stroller, so as to move the first seat unit close to the firstseat frame for unfolding the first seat back and the first seat body.

According to the claimed invention, the first seat back includes a firstengaging portion and a resilient constraining portion. The upper seattube includes a second engaging portion slidably engaged with the firstengaging portion. The resilient constraining portion abuts against partof the second engaging portion to constrain relative motion between thefirst engaging portion and the second engaging portion.

According to the claimed invention, the first seat body includes aclipping portion and a resilient restraining portion. The clippingportion clips the lower seat tube, and the resilient restraining portionabuts against the lower seat tube to prevent the lower seat tube and theclipping portion from separation.

According to the claimed invention, the supporting unit is an infantcarrier detachably disposed on the seat hub.

According to the claimed invention, the stroller frame includes a frontleg member, a rear leg member, a supporting member and a handle member.The supporting member is rotatably disposed between the front leg memberand the rear leg member. The front leg member is rotatably connected toan end of the handle member. The rear leg member is rotatably connectedto a portion of the handle member adjacent to the foresaid end.

According to the claimed invention, the stroller frame further includesa fastening member disposed between the front leg member and the handlemember, and adapted to constrain relative position between the front legmember and the handle member for steadying the stroller frame in afolding mode or a service mode.

According to the claimed invention, the front leg member includes afirst wheel, and the rear leg member includes a second wheel.

According to the claimed invention, the handle member is disposed abovethe front leg member and the rear leg member. The front leg member andthe rear leg member are defined as a lower section of the two sections.The handle member is defined as an upper section of the two sections.

According to the claimed invention, the stroller frame further includesa first seat link and a second seat link. A lower end of the second seatlink is rotatably disposed on the rear leg member. Two ends of the firstseat link are respectively connected to an upper end of the second seatlink and the handle member in a rotatable manner.

According to the claimed invention, the first seat link includes anassembling portion, and the seat hub includes a latching portion. Thelatching portion is detachably assembled with the assembling portion tofix the first seat frame on the stroller frame.

According to the claimed invention, the child stroller further includesa bench seat rotatably disposed on the other section of the twosections.

According to the claimed invention, the bench seat is rotatablyconnected to the rear leg member and the supporting member of thestroller frame. The bench seat includes a first buckling portion, andthe supporting member includes a second buckling portion. The firstbuckling portion is buckled with the second buckling portion to steadythe bench seat in a service mode.

According to the claimed invention, the bench seat further includes aresilient plate portion and an actuating component. The first bucklingportion is disposed on the resilient plate portion. The actuatingcomponent is connected to the resilient plate portion and stretchestoward a seat surface of the bench seat. The resilient plate portion isresiliently deformed by the actuating component to separate the firstbuckling portion from the second buckling portion.

According to the claimed invention, the bench seat further includes arib structure adapted to abut against the supporting member forconstraining a rotary angle of the bench seat.

According to the claimed invention, the child stroller further includesa stand platform disposed on the other section and adjacent to the benchseat.

According to the claimed invention, the child stroller further includesa second seat detachably disposed on the other section of the twosections.

These and other objectives of the present invention will no doubt becomeobvious to those of ordinary skill in the art after reading thefollowing detailed description of the preferred embodiment that isillustrated in the various figures and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram of a child stroller in a service mode according toan embodiment of the present invention.

FIG. 2 is a diagram of the child stroller in a folding mode according tothe embodiment of the present invention.

FIG. 3 and FIG. 4 are diagrams of a first seat in different assemblyphases according to one embodiment of the present invention.

FIG. 5 is a sectional view of a first seat link and a seat hub accordingto the embodiment of the present invention.

FIG. 6 to FIG. 8 are diagrams of the first seat in folding and unfoldingmodes according to the embodiment of the present invention.

FIG. 9 is a diagram of the first seat in another mode according to theembodiment of the present invention.

FIG. 10 and FIG. 11 are diagrams of the first seat in different assemblyphases according to another embodiment of the present invention.

FIG. 11 to FIG. 13 are diagram of the first seat in folding andunfolding phases according to the embodiment of the present invention.

FIG. 14 is a diagram of a bench seat in the non-service mode accordingto the embodiment of the present invention.

FIG. 15 is a diagram of the bench seat in the service mode according tothe embodiment of the present invention.

FIG. 16 to FIG. 18 are diagrams of the bench seat in different phasesaccording to the embodiment of the present invention.

DETAILED DESCRIPTION

Please refer to FIG. 1 and FIG. 2. FIG. 1 is a diagram of a childstroller 10 in a service mode according to an embodiment of the presentinvention. FIG. 2 is a diagram of the child stroller 10 in a foldingmode according to the embodiment of the present invention. The childstroller 10 can include a stroller frame 12, a first seat 14, a secondseat 16, a bench seat 18 and a stand platform 20. The stroller frame 12can include a front leg member 22, a rear leg member 24, a supportingmember 26, a handle member 28 and a fastening member 30. The supportingmember 26 can be rotatably disposed between the front leg member 22 andthe rear leg member 24. One or several first wheels 32 can be disposedon a bottom of the front leg member 22. A top of the front leg member 22can be rotatably connected an end 281 of the handle member 28.

The rear leg member 24 can be rotatably connected to a portion of thehandle member 28 adjacent to the end 281, and have one or several secondwheels 34. The fastening member 30 can be disposed between the front legmember 22 and the handle member 28, and used to constrain relativeposition between the front leg member 22 and the handle member 28, so asto steady the stroller frame 12 in the service mode shown in FIG. 1 orin the folding mode shown in FIG. 2. The handle member 28 can bedisposed above the front leg member 22 and the rear leg member 24. Thefront leg member 22 and the rear leg member 24 can be defined as a lowersection of the stroller frame 12; the handle member 28 can be defined asan upper section of the stroller frame 12.

The stroller frame 12 can further include a first seat link 36 and asecond seat link 38. A lower end of the second seat link 38 can berotatably disposed on the rear leg member 24. Two ends of the first seatlink 36 can be respectively connected to an upper end of the second seatlink 38 and the handle member 28 in a rotatable manner. The rear legmember 24, the handle member 28, the first seat link 36 and the secondseat link 38 can be assembled to set as a four-bar linkage mechanism ofthe stroller frame 12, so that the child stroller 10 can be folded andunfolded easily. The first seat link 36 may include an assemblingportion 40.

The upper section and the lower section of the stroller frame 12 can befolded and unfolded relative to each other. The first seat 14 can bedetachably disposed on the upper section, such as the handle member 28.The second seat 16 can be detachably disposed on the lower section, suchas somewhere between the front leg member 22 and the supporting member26. The bench seat 18 and the stand platform 20 can be disposed on thelower section, such as the rear leg member 24. The bench seat 18 can berotated relative to the rear leg member 24. The stand platform 20 can beadjacent to the bench seat 18; a child can step on the stand platform 20comfortably when sitting the bench seat 18.

Please refer to FIG. 1 to FIG. 5. FIG. 3 and FIG. 4 are diagrams of thefirst seat 14 in different assembly phases according to one embodimentof the present invention. FIG. 5 is a sectional view of the first seatlink 36 and the seat hub 46 according to the embodiment of the presentinvention. The first seat 14 can include a supporting unit 42 and afirst seat frame 44. The first seat frame 44 can hold the supportingunit 42. The first seat frame 44 can include a seat hub 46, an upperseat tube 48 and a lower seat tube 50. The seat hub 46 can include alatching portion 52. The latching portion 52 can be detachably disposedon the assembling portion 40 of the first seat link 36, so as to stablyfix the first seat frame 44 on the stroller frame 12. The latchingportion 52 may be moved from an unlocking position to a locking positionoptionally via a spring 54, as shown in FIG. 5.

The upper seat tube 48 can be disposed above the seat hub 46. The lowerseat tube 50 can be disposed under the seat hub 46. The supporting unit42 can be slidably disposed on the upper seat tube 48. The lower seattube 50 can be detachably connected to the supporting unit 42. In oneembodiment, the upper seat tube 48 can be rotated relative to thestroller frame 12 via the seat hub 46. The lower seat tube 50 can bemovably connected to the seat hub 46. When the stroller frame 12 isfolded, the lower seat tube 50 can move the supporting unit 42 relativeto the upper seat tube 48 for unfolding the supporting unit 42, and asize of the supporting unit 42 can be decreased accordingly.

Furthermore, the supporting unit 42 can be a first seat unit 42A. Thefirst seat unit 42A can include a first seat back 56 and a first seatbody 58. The first seat back 56 can be detachably connected to an upperend of the upper seat tube 48 in a slidable manner. The first seat body58 can be detachably connected to a lower end of the upper seat tube 48in the slidable manner. The first seat unit 42A can further include atextile product 60 disposed on the first seat back 56 and the first seatbody 58. The textile product 60 can slide the first seat back 56 or thefirst seat body 58 relative to the upper seat tube 48 when the strollerframe 12 is folded or unfolded, so that the first seat unit 42A can beeasily folded and unfolded.

The first seat back 56 can include an upper sliding slot portion 62, alower sliding slot portion 64 and a resilient locking portion 66. Theresilient locking portion 66 can be disposed on a position adjacent tothe lower sliding slot portion 64. The upper sliding slot portion 62 canbe assembled with an upper end of the upper seat tube 48. The lowersliding slot portion 64 can be assembled with the lower seat tube 50.The resilient locking portion 66 can block the lower seat tube 50 toprevent the lower seat tube 50 and the lower sliding slot portion 64from separation, which results in the first seat unit 42A removed fromthe first seat frame 44. In addition, the first seat body 58 can includea front sliding slot portion 68 assembled with a lower end of the upperseat tube 48. If the upper sliding slot portion 62 is separated from theupper seat tube 48 and the resilient locking portion 66 is unlocked todisassemble the lower sliding slot portion 64 from the lower seat tube50, the first seat back 56 can be removed from the first seat frame 44.If the front sliding slot portion 68 and the upper seat tube 48 aredisassembled, the first seat body 58 can be removed from the first seatframe 44.

Thus, as shown in FIG. 3 and FIG. 4, the upper sliding slot portion 62of the first seat back 56 can be assembled with the upper seat tube 48,and the lower seat tube 50 can be clipped by the lower sliding slotportion 64 and the resilient locking portion 66, so that the first seatback 56 can be stably disposed on the first seat frame 44. The frontsliding slot portion 68 of the first seat body 58 can be assembled withthe upper seat tube 48, and the first seat body 58 can be assembled withthe first seat frame 44. Then, the textile product 60 can be installedon the first seat back 56 and the first seat body 58, and the latchingportion 52 of the seat hub 46 can be assembled with the assemblingportion 40 of the first seat link 36, so the first seat 14 can stablydisposed on the stroller frame 12.

Please refer to FIG. 1 to FIG. 8. FIG. 6 to FIG. 8 are diagrams of thefirst seat 14 in folding and unfolding modes according to one embodimentof the present invention. As shown in FIG. 6, when the child stroller 10is prepared to fold, the fastening member 30 can be lifted to rotate thefront leg member 22 in a first rotary direction D1 and rotate the handlemember 28 in a second rotary direction D2. As shown in FIG. 7, anincluded angle between the rear leg member 24 and the supporting member26 can be reduced in response to the folded child stroller 10, and anincluded angle between the first seat link 36 and the second seat link38 can be reduced accordingly; meanwhile, the first seat 14 still can bekept in the unfolding mode.

As shown in FIG. 8, when the stroller frame 12 is folded to abut thelower seat tube 50 against the second seat 16, the lower seat tube 50can be moved along a surface of the second seat 16 and rotated relativeto the seat hub 46 in the second rotary direction D2. The lower slidingslot portion 64 can be pressed by rotation of the lower seat tube 50,and the first seat back 56 can be moved relative to the upper seat tube48 via the upper sliding slot portion 62; in the meantime, the textileproduct 60 can move the first seat body 58 relative to the upper seattube 48 via the front sliding slot portion 68. It is to say, the lowerseat tube 50 can press and move the first seat unit 42A close to thefirst seat frame 44, so as to unfold the first seat back 56 and thefirst seat body 58.

Please refer to FIG. 9. FIG. 9 is a diagram of the first seat 14 inanother mode according to the embodiment of the present invention. Thesupporting unit 42 of the first seat 14 may be an infant carrier 42B,and the infant carrier 42B can include a bolting component 92. When thefirst seat unit 42A is removed from the first seat frame 44, the firstseat unit 42A can be replaced by the infant carrier 42B, and the infantcarrier 42B can be detachably disposed on the seat hub 46 via thebolting component 92.

Please refer to FIG. 10 and FIG. 11. FIG. 10 and FIG. 11 are diagrams ofthe first seat 14 in different assembly phases according to anotherembodiment of the present invention. In the embodiment, the first seat14 can include the supporting unit 42 and a first seat frame 70, and thesupporting unit 42 can be a first seat unit 42C. The first seat frame 70can include a seat hub 72, an upper seat tube 74 and a lower seat tube76. The seat hub 72 can include a latching portion (not shown in thefigures), and have function similar to the latching portion 52 of theseat hub 46. The upper seat tube 74 and the lower seat tube 76 can bedisposed on the seat hub 72, and can be rotated relative to the strollerframe 12 via the seat hub 72. The first seat unit 42C can include afirst seat back 78 and a first seat body 80. The first seat back 78 canbe engaged with the upper seat tube 74, and the first seat body 80 canbe engaged with the lower seat tube 76.

The first seat back 78 can include a first engaging portion 82 and aresilient constraining portion 84. The upper seat tube 74 can include asecond engaging portion 86. The first engaging portion 82 can slidablyengaged with the second engaging portion 86, and the resilientconstraining portion 84 can abut against part of the second engagingportion 86 to constrain relative motion between the first engagingportion 82 and the second engaging portion 86, for stably installing thefirst seat back 78 on the upper seat tube 74. Besides, the first seatbody 80 can include a clipping portion 88 and a resilient restrainingportion 90. The clipping portion 88 can clip the lower seat tube 76. Theresilient restraining portion 90 can abut against part of the lower seattube 76, so as to prevent the lower seat tube 76 and the clippingportion 88 from separation for stably installing the first seat body 80on the lower seat tube 76.

Please refer to FIG. 10 to FIG. 13. FIG. 11 to FIG. 13 are diagram ofthe first seat 14 in folding and unfolding phases according to theembodiment of the present invention. As shown in FIG. 11 and FIG. 12,when the child stroller 10 is prepared to fold, the fastening member 30can be lifted to rotate the front leg member 22 in the first rotarydirection D1 and rotate the handle member 28 in the second rotarydirection D2. The included angle between the rear leg member 24 and thesupporting member 26 can be reduced in response to the folded childstroller 10, and the included angle between the first seat link 36 andthe second seat link 38 can be reduced accordingly. As shown in FIG. 12and FIG. 13, when the stroller frame 12 is folded, the first seat unit42C and the first seat frame 70 of the first seat 14 can be storedinside members of the stroller frame 12 to minimize the size of thechild stroller 10.

Please refer to FIG. 14 to FIG. 18. FIG. 14 is a diagram of the benchseat 18 in the non-service mode according to the embodiment of thepresent invention. FIG. 15 is a diagram of the bench seat 18 in theservice mode according to the embodiment of the present invention. FIG.16 to FIG. 18 are diagrams of the bench seat 18 in different phasesaccording to the embodiment of the present invention. The bench seat 18can be rotatably connected to the rear leg member 24 and the supportingmember 26 of the stroller frame 12. As shown in FIG. 14, the bench seat18 can be rotated outward, and a seat surface of the bench seat 18 facesthe lateral, so the child cannot sit the bench seat 18; meanwhile, abottom of the child stroller 10 can provide large storage space. Asshown in FIG. 15, the bench seat 18 can be rotated inward, and the seatsurface of the bench seat 18 faces the top, so the child can sit thebench seat 18 and step on the stand platform 20.

The bench seat 18 can include a first buckling portion 94, a resilientplate portion 96, an actuating component 98 and a rib structure 100. Theresilient plate portion 96 can be stretched from a side of the seatsurface of the bench seat 18 downwardly. The first buckling portion 94can be formed on the resilient plate portion 96. The actuating component98 can be connected to the resilient plate portion 96, and optionallystretch toward the seat surface of the bench seat 18. The rib structure100 can be disposed inside the bench seat 18 and adjacent to thesupporting member 26. The supporting member 26 can include a secondbuckling portion 102. The second buckling portion 102 can include aninclined guiding surface structure used to conveniently buckle the firstbuckling portion 94 and the second buckling portion 102. When the firstbuckling portion 94 is assembled with the second buckling portion 102,the bench seat 18 cannot rotate and be positioned at the service mode.If the bench seat 18 is prepared to switch into the non-service mode,the actuating component 98 can be pulled from the seat surface of thebench seat 18, and the resilient plate portion 96 can be resilientlydeformed by pulling of the actuating component 98, so that the firstbuckling portion 94 and the second buckling portion 102 can be separatedand the bench seat 18 can be freely rotated. The rib structure 100 canabut against the supporting member 26 to constrain a rotary angle of thebench seat 18 in a specific situation.

In conclusion, when the child stroller of the present invention isfolded and unfolded, the first seat can be stored inside the strollerframe via actuation of the first seat link and the second seat link;besides, the supporting unit can be pulled by the first seat frame ofthe first seat, so the seat back and the seat body of the supportingunit can be rotated relative to each other for minimizing the foldingsize of the child stroller. Moreover, the bench seat can be rotatedrelative to the stroller frame of the child stroller. The child can sitthe bench seat in the service mode and step on the stand platform. Thestorage space of the child stroller can be enlarged in response to thebench seat switched into the non-service mode.

Those skilled in the art will readily observe that numerousmodifications and alterations of the device and method may be made whileretaining the teachings of the invention. Accordingly, the abovedisclosure should be construed as limited only by the metes and boundsof the appended claims.

What is claimed is:
 1. A child stroller, comprising: a stroller frame,having two sections capable of being folded and unfolded relative toeach other; and a first seat disposed on one of the two sections in adetachable manner, the first seat comprising: a supporting unit; and afirst seat frame adapted to hold the supporting unit, the first seatframe comprising: a seat hub disposed on the stroller frame; an upperseat tube disposed on the seat hub, the supporting unit being slidablydisposed on the upper seat tube; and a lower seat tube disposed on theseat hub and detachably connected to the supporting unit.
 2. The childstroller of claim 1, wherein the upper seat tube is rotated relative tothe stroller frame via the seat hub, the lower seat tube is movablyconnected to the seat hub and adapted to slide the supporting unitrelative to the upper seat tube when the stroller frame is folded. 3.The child stroller of claim 1, wherein the upper seat tube and the lowerseat tube are rotated relative to the stroller frame via the seat hub.4. The child stroller of claim 1, wherein the supporting unit is a firstseat unit, the first seat unit comprises a first seat back and a firstseat body detachably disposed on the first seat frame.
 5. The childstroller of claim 4, wherein the first seat back is slidably connectedto an upper end of the upper seat tube, the first seat body is slidablyconnected to a lower end of the upper seat tube.
 6. The child strollerof claim 4, wherein the first seat back is engaged with the upper seattube, the first seat body is engaged with the lower seat tube.
 7. Thechild stroller of claim 5, wherein the first seat unit further comprisesa textile product installed on the first seat back and the first seatbody, and adapted to move the first seat back or the first seat bodyrelative to the upper seat tube when the stroller frame is folded orunfolded.
 8. The child stroller of claim 5, wherein the first seat backcomprises an upper sliding slot portion and a lower sliding slotportion, the upper sliding slot portion is assembled with the upper endof the upper seat tube, the lower sliding slot portion is assembled withthe lower seat tube.
 9. The child stroller of claim 8, wherein the firstseat back further comprises a resilient locking portion disposed on thelower sliding slot portion and adapted to block the lower seat tube, forpreventing the first seat unit and the first seat frame from separation.10. The child stroller of claim 9, wherein the first seat back isremoved from the first seat frame when the upper sliding slot portion isseparated from the upper seat tube and the resilient locking portion isunlocked to separate the lower sliding slot portion from the lower seattube.
 11. The child stroller of claim 5, wherein the first seat bodycomprises a front sliding slot portion assembled with the lower end ofthe upper seat tube.
 12. The child stroller of claim 11, wherein thefront sliding slot portion is separated from the upper seat tube toremove the first seat body from the first seat frame.
 13. The childstroller of claim 5, wherein when the stroller frame is folded, thelower seat tube abuts against and moves relative to a second seat of thechild stroller, so as to move the first seat unit close to the firstseat frame for unfolding the first seat back and the first seat body.14. The child stroller of claim 6, wherein the first seatback comprisesa first engaging portion and a resilient constraining portion, the upperseat tube comprises a second engaging portion slidably engaged with thefirst engaging portion, the resilient constraining portion abuts againstpart of the second engaging portion to constrain relative motion betweenthe first engaging portion and the second engaging portion.
 15. Thechild stroller of claim 14, wherein the first seat body comprises aclipping portion and a resilient restraining portion, the clippingportion clips the lower seat tube, the resilient restraining portionabuts against the lower seat tube to prevent the lower seat tube and theclipping portion from separation.
 16. The child stroller of claim 1,wherein the supporting unit is an infant carrier detachably disposed onthe seat hub.
 17. The child stroller of claim 1, wherein the strollerframe comprises a front leg member, a rear leg member, a supportingmember and a handle member, the supporting member is rotatably disposedbetween the front leg member and the rear leg member, the front legmember is rotatably connected to an end of the handle member, the rearleg member is rotatably connected to a portion of the handle memberadjacent to the foresaid end.
 18. The child stroller of claim 17,wherein the stroller frame further comprises a fastening member disposedbetween the front leg member and the handle member, and adapted toconstrain relative position between the front leg member and the handlemember for steadying the stroller frame in a folding mode or a servicemode.
 19. The child stroller of claim 17, wherein the front leg membercomprises a first wheel, the rear leg member comprises a second wheel.20. The child stroller of claim 17, wherein the handle member isdisposed above the front leg member and the rear leg member, the frontleg member and the rear leg member are defined as a lower section of thetwo sections, the handle member is defined as an upper section of thetwo sections.
 21. The child stroller of claim 17, wherein the strollerframe further comprises a first seat link and a second seat link, alower end of the second seat link is rotatably disposed on the rear legmember, two ends of the first seat link are respectively connected to anupper end of the second seat link and the handle member in a rotatablemanner.
 22. The child stroller of claim 21, wherein the first seat linkcomprises an assembling portion, the seat hub comprises a latchingportion, the latching portion is detachably assembled with theassembling portion to fix the first seat frame on the stroller frame.23. The child stroller of claim 1, wherein the child stroller furthercomprises a bench seat rotatably disposed on the other section of thetwo sections.
 24. The child stroller of claim 23, wherein the bench seatis rotatably connected to the rear leg member and the supporting memberof the stroller frame, the bench seat comprises a first bucklingportion, the supporting member comprises a second buckling portion, thefirst buckling portion is buckled with the second buckling portion tosteady the bench seat in a service mode.
 25. The child stroller of claim24, wherein the bench seat further comprises a resilient plate portionand an actuating component, the first buckling portion is disposed onthe resilient plate portion, the actuating component is connected to theresilient plate portion and stretches toward a seat surface of the benchseat, the resilient plate portion is resiliently deformed by theactuating component to separate the first buckling portion from thesecond buckling portion.
 26. The child stroller of claim 24, wherein thebench seat further comprises a rib structure adapted to abut against thesupporting member for constraining a rotary angle of the bench seat. 27.The child stroller of claim 23, wherein the child stroller furthercomprises a stand platform disposed on the other section and adjacent tothe bench seat.
 28. The child stroller of claim 1, wherein the childstroller further comprises a second seat detachably disposed on theother section of the two sections.